%0 Journal Article %T 土壤理化性质和微生物活性对水田改果园的动态响应 %T Response of Soil Physicochemical Properties and Microbial Activity on Land-use Conversion from Paddy Field to Orchard Farm %A 杨东伟 %A 章明奎 %A 刘千千 %A 张鹏启 %A 李雪 %A 董静 %A 黄笑 %A Yang Dongwei %A Zhang Mingkui %A Liu Qianqian %A Zhang Pengqi %A Li Xue %A Dong Jing %A Huang Xiao %J 水土保持通报 %J 水土保持通报英文版 %@ 1000-288X %V 39 %N 2 %D 2019 %P 48-55 %K 土地利用;水田;土壤环境因子;酶活性;演替 %K land use;paddy field;soil environmental factors;enzymatic activity;succession %X [目的]探讨土壤微生物特性及环境因子对水田改果园的动态响应规律,为进一步研究土地利用变化对土壤生态环境的影响,预测水田改果园后土壤质量的长期变化趋势提供科学依据。[方法]在浙江省范围内选择1个代表性的水田改果园土壤系列,采用后切时间序列法,分析水田改果园后土壤理化性质、土壤微生物生物量及酶活性等指标的动态响应规律。[结果]水田改果园后,土壤含水率、>0.25 mm水稳定性团聚体、pH值、有机质、盐基饱和度、全氮、碱解氮含量显著(p<0.01)下降,全钾、有效钾、全磷和有效磷含量分别增加了21.9%,54.7%,42.0%和6.65倍,并且这些指标都与植树年限呈极显著(p<0.01)相关。改果园后,土壤微生物生物量碳和氮平均含量分别下降了74.4%和73.3%,土壤脲酶和酸性磷酸酶活性平均值分别增加了40.0%和41.8%,土壤过氧化氢酶活性平均值下降69.3%,并都与植树年限呈极显著相关(p<0.01)。[结论]水田改果园后土壤环境因子发生阶段性变化,且土地利用方式的影响要大于利用年限的影响。水田改果园后土壤综合肥力下降,并对生态环境和土地可持续利用带来不利影响。 %X [Objective] The dynamic response of soil microbial characteristics and environmental factors to the change of paddy fields into orchards was discussed in order to provide a scientific basis for further study of the impact of land use change on soil ecological environment and prediction of the long-term change trend of soil quality after the change of paddy fields to orchards.[Methods] One representative soil series of land-use change from paddy to orchard were chosen in Zhejiang Province, furthermore, the law of dynamic response of soil physicochemical properties, enzyme activity and soil microbial biomass to land-use change was analyzed using the post-cut time series method.[Results] Soil moisture, > 0.25 mm water stable aggregate, pH value, organic matter, base saturation, total nitrogen and alkali-hydrolyzable nitrogen fell down significantly(p < 0.01), however, total phosphorus, available phosphorus and available potassium increased by 21.9%,54.7%,42.0% and 6.65 times, respectively, and these indexes were correlated with years of planting trees significantly(p < 0.01). After the land-use change, the average of soil microbial biomass carbon and nitrogen decreased by 74.4% and 73.3%, respectively. The average of soil urease and acid phosphatase activity increased by 40.0% and 41.8%, respectively. However, the mean value of soil catalase activity decreased by 69.3%, and they were significantly(p < 0.01) correlated with the time of planting trees.[Conclusion] After the land-use conversion from the paddy field to orchard farm, soil environmental factors changed periodically, and the influence of land-use pattern was greater than that of land-use history. Moreover, soil comprehensive fertility decreased, and the ecological environment and sustainability of land use were adversely affected. %R 10.13961/j.cnki.stbctb.2019.02.008 %U http://stbctb.alljournal.com.cn/stbctb/home %1 JIS Version 3.0.0